from tkinter import *
print ('Введите начальною координату X: ')
X = int(input())
print ('Введите начальною координату Y: ')
Y = int(input())
print ('Введите начальною координату N: ')
N = int(input())

coords = [ 0,0,10,0,10,10,20,10,20,20,0,20]

if N == 0 and X>=0 and X<=500 and Y>=0 and Y<=500:
    pass
else:
    if N > 0 and 0*N+X>=0 and 0*N+Y>=0 and 20*N+X<=500 and 20 *N+Y<=500:
        pass
    else:
        if N < 0 and 20*N+X>=0 and 20*N+Y>=0 and 0*N+X<=500 and 0*N+Y<=500:
            else:
                print (' размер фигуры превышает максимальный размер поля')
                exit()


root = Tk()
root.title("ИТ марафон ")
root.geometry ("500x500")

canvas = Canvas (bg="white",  width=500, heidht=500)\
canvas.pack(anchor=CENTER, expand=1)

canvas.create_polygon(coords [0] *N+X, coords [1] *N+Y,
                      coords [2] *N+X, coords [3] *N+Y,
                      coords [4] *N+X, coords [5] *N+Y,
                      coords [6] *N+X, coords [7] *N+Y,
                      coords [8] *N+X, coords [9] *N+Y,
                      coords [10] *N+X, coords [11] *N+Y,

root.mainloop()                      

                   
                
